Caster-wheel.



A. B. CLARK. @ASTER WHEEL. APPLICATION HLED JUNE 12, 1911.

Patented Sept. 10, 1912.

.ASI-BERT B. CLARK, QF HAMBURG, NEW YORK.

Casarsa-WHEEL.

Specification or Letterslatent. appli-cation medfxune- 1e, 19m. -seriarNa cs2-,ain

Patented sept. 1.o, 1912.

1'0 all whom 'it may concern: Be it known that I, ALBERT B. lnamr, a citizen of the United States, residing at Hamburg in the county of Erie and State of New York, have invented new and use'ful Improvements' in Caster-Wheels, of which the following is av specification.

This invention relates to a wheel which 1s more particularly designed foruse on the casters of trucks although the same may.

alsobe used for other purposes.

It is the object of this invention to produce a wheel for this purpose wh1ch is stronger and more durable than the wheels heretofore in use for this purpose, which runs easily and is not liable to stretch, and which will not become loose nor detached.'

In the accompanying drawings: Figure l is a side elevation of a truck caster provided with one of my improved wheels. Fig. 2 is a vertical longitudmal section of the same.

Fig. 3 isa llongitudinal section, on an enlarged scale, of the bushing forming part of my improved wheel.

Similar numerals of reference indicate.

corresponding parts throughout' the several views. f

vThe bracket forming art of the caster upon which my improve wheel is mounted may be variously constructed but that shown in the drawingsl comprisesl an .upper base or attaching plate which is. adapted to be secured to the body of the truck and two lugs 2depending from the underside of the at` tachmg plate and provided near their lower ends with coinciding openings which receive a pivot bolt 3 upon which the caster.

wheel -is journaled.

' My improved caster wheel is mounted on the pivot bolt between the lugs 2 and is constructed as follows:

4 represents a bushing of tubularform mounted on the central part of the p iv'ot bolt and 5, 5 are two circular or disk-shaped heads or langes provided with central per-` forations whereby they are mounted upon the pivot bolt at opposite ends of the bushing. On its inner side and around its centrai opening each disk or head is providedi with a circular counter -bore or recess 6 which receives the adjacent end o the bushing. By this means the bushing and end headsare centered or held axially in alinement with reference to each other so that the bores of ythese parts always engage uniformly with the pivot bolt and the wear upon the same is distributed evenl 7 represents a plurality of bearlng disks y which are'arranged side by side on the bushing between the end heads of the .wheel and which are provided 'with coinciding centraljopenings which receive the bushing. The bushing and end heads are preferably constructed of metal but the bearing disks 7 are constructed Aof fibrous material preferably raw hide or leather, firmly cemented, making a solid wheel, inasmuch as this material While running over the floor is comparatively noiseless, somewhat yieldin and Wears very long. The two heads are rmly clamped against opposite sides of the series of bearing disks and also against opposite ends of the central bushing by means of a plurality of tie members conslsting preferably of bolts 8 passing at suitable intervals lengthwise through the two heads and the bearing disks between -the same, as shown in Figs. 1 and 2. The bearingdisks engage their bores snugly with the v eriphery of the bushing so that the load is rmly supported and the outer sides of the heads bear against the inner sides of the bracket lugs so that there .is no lengthwise play of the wheel on the plvot bolt. The bore of the bushin is provlded with recesses 9 which are pre erably constructed in' the form of spiral grooves and which' are lled with graphite 10. The ends of the bushing are also provided with annular grooves 11 whichl are filled with graphite 12.

M improved wheel can be produced at considerably less cost than Wheels of this character provided with rubber tires, they are much more durable and fully as'noiseiess as rubber tire wheels, and the same are much more durable and capable of withstanding greater wear and tear than rubber tirevwheels. Furthermore, this wheel is absolutely waterproof and therefore not liable FII with coinciding central openings,.a bushing ments receive the ends of the bushing, and arranged in `said openings and having its tie members connecting said disks and heads. 10 opposlte ends projectingvbeyond the outer Witness my hand this 25th day of May,

slde of the outermost disks, two heads en- 1911. gaging with the outer side of the outermost ALBERT B. CLARK. disksA and provided with central openings Witnesses:

Timoa L. PoPP,

and with enlargements or rabbets at the ANNA HEIGIS.

inner ends of their openings which enlarge- 

